Rately

Rately is a service that adds a protective layer in front of your API to control how many requests it receives. It acts as a proxy, sitting between your users and your servers at Cloudflare's global network edge. When a request comes in, Rately checks it against the rules you've set—like how many calls a specific user can make per minute—before it ever reaches your infrastructure. If a user exceeds their limit, Rately blocks the request, preventing overload and potential abuse.

The tool stands out by being both fast and highly customizable. It promises to enforce limits with minimal latency, around 25 milliseconds. You can define rate limits based on a wide range of criteria, not just IP addresses. This includes User IDs, country of origin, organization, or any other custom property from the request. This flexibility allows for sophisticated policies, such as giving premium users higher limits or blocking traffic from specific geographic regions entirely.

Rately is ideal for developers and companies running APIs who want to prevent downtime and ensure fair usage without building a complex rate-limiting system from scratch. It's a practical solution for SaaS platforms that need to tier access for different customer plans, for public APIs that want to guard against bots and denial-of-service attacks, and for any team that needs to quickly add a robust security and traffic management layer to their backend services.